How to access BlackBerry 8830 mobile phone?
I have a BlackBerry 8830 and I am encountering issues on it. When it is not connected with the power cord, the display will becomes black. When I connect it, I can only move the trackball and go to processes like, the installation, information, schedule but nothing appears or nothing happens when I just select the trackball and the keyboard. But beside that, I cannot access anything more. And after few seconds, the display becomes black again even if it's connected with the power cord and just repeat the same process again and again. How can I access my phone's system? I can update it but I do not want to lose some information stored on it.